S Carreg: Japanese knotweed is indeed a menace in Wales. Have you talked to Martin Bryant at Environet UK yet?
He's based in Wales and all he does is eradicate JK so may be worth a chat. 029 2060 1863
Allen Lumley may well have found a way to contain his infestation, but I'm afraid there's no way he's killed it! It will perhaps be dormant for now, but it will reemerge in the fullness of time
in its insatiable quest for water and light.
